Fire-alarm apparatus



1. WILSON. FIRE: ALARM APPARATUS. APPLICATION FILED JAN. 23, 1920.

1,356,104 Pana Oct. 19,1920.

I 2 SHEETS-f-SHEET l.

J. WILSON.

4FIRE ALARM APPARATUS.

APPLlcAnoN 'HLED JAN. 28, 1920.

Patented Oct. 19,1920.

2 SHEETS-SHEET 2.

JOHN WILSON, or WILMo'r, MICHIG.

FIRE-ALARM APPARATUS.

specification of Letters Fatent.

Patentea Oct. 19, 1920.

Appneation fiiea January 28, 1920.V serial No. 858,422. I

To all 'witam it may Gomera: i

Be it known that I, JOHN WILSON, a citizen of the United States of America, residing at W'ilmot, in the county of Tuscola and State of Michigan, have invented 'certain new and useful lmprovements in Fire- Alarm Apparatus, of which the following is a specification, reference being had therein to the Vaccompanying drawings. i

This invention relates to a fire alarm apparatus and has for its principal obj ect the provision of efiicient means carried` bythe roof of a building contiguous to the chimney for sounding an alarm when the building is on fire near or adjacent to the chimney. i

l/Vith these and other objects in' view this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the drawings: g I

Figure 1 is a sectional viewof a building, showing in side elevation my apparatus in place thereon.

F ig'. 2 is a fragmentary perspective view of a building, showing particularly the 'povsitioning of the upper portion ofmy apparatus on the roof contiguous to the chimney. Fig. 3 is a diagrammatic Vperspectiveview of my apparatus showing particularly the alarm. p

' Fig. 4 is a vertical sectional view of one of the sleeves carried by the roof of the building. i p

Fig. 5v is a fragmentary side view of one of thebars vor triggers showing theV wood eyelet therein.

Referring to the drawings by lnumerals 1 designates a bell that I preferably attach to the chimney 2 by means of a, plate 2a. Coperating with thebell 1 is a Striker 3 of the clapper device A, that is operated by a coiled spring device formed in'the usual manner; this coiled SpringdeViCe is provided with aV frame and ratchet 5, and engaging ratchet 5 is the pawl or dog device 6.

This pawl device comprises weighted bar 7, which bar 7 is engaged near its forward end by an 'angle extension 8 of coiled spring 9, which coiled spring 9 is fastened around the pivot pin 10 of the pawl device 6. This spring 9 holds the toothed end 11 of the bar 7 normally in engagement with the teeth of the ratchet wheel 5, preventing the alarm from sounding by reason of the gears faste'nedto the primary plate 2a that is nlormally attached to the chimney 2.

The inner end 12 of bar or pawl 7 is engaged by `a plurality of bars or fingers 13, which bars or fing'ers 13 are pivotally mounted upon a substantially i U-shaped bracket 14 that is secured to the chimney i plate 2a. [the bracketV 141 are positioned coiled sprlngs 15 that exerta downward pressure at their outer angle ends 16 upon i the auxiliarybars 13. Near the outer end o f each bar 13 is formed an enlarged portion having an aperture and in the apel'- ture, at 17, is positioned the cables or cords 18, which cables or cords 18 are formed Of i any infiammable or fusible material, so as to be more quckly severedl byV a fiame, when a house or dwelling is on fire.

As seen more, particularly in the diagram shown in F ig., 3, the cords ,18 may lead to several chimneys as B, or the cords 18 may lead to the furnace C in the basement ofa dwelling or building; i the same function being produced in any case, whetherthe cord leads to a chimney or near a furnace and hence it will only be'necessary to describe the connection andV operation of one set of cords which I have particularly shown in F igs. 1 and 2 of the drawings.

It will beunderstood that if any one of the cords or cables 18 is severed, this severance will release the auxiliary bar or trigger 13, causing the bar or trigger, through the `action of the spring l'thereof, to move downwardly, pressing strongly upon the end 12 of the pawl 7, ldisengaging theftooth 11 thereofl from the ratchetwheel-, thereby sounding the alarm throughithe action of the pclapper device upon the bell 1.

` To 'eachV oflthe cords or cables 18, running to a chimney, at its upper lend is att'acheda pulley 19 around which the intermediate cord or cable 20 ppasses. To the upper ends of the intermediate cord or cable 20 are secured the intermediate pulleysV 21.

Passing around each of pulleys 21 are roof corner-pulleys 24 and through sleeves 25 carried in the roof 26 of the building, these sleeves25 being arranged' close to the chinr' ney so that if the roof catches on fire near the chimney a cord or cords Will be severed by burning of same, thereby permitting at least one of the pulleys 21 to drop consequently permitting pulley 19 and cord 18 to drop too, releasingspring-pressed bar or trigger 13,`Whereby it Will press down upon end 12 of bar Tireleasing the clapper device and thereby resulting in the sounding of the alarm.

Each sleeve 25 is provided With a pulley 27 in its upper end over Whichv a roof connecting cord or cable 22 passes. The outer ends of these roof connecting corcls 22 are fastened, as at 28, to different parts of the roof.

It Will be obvious that these roof connecting cords or cables 22 can be extended a greater or a less distance from the chimney, the extending of the cords 22 to the eX- treme edge of the roof falling Within the scope of this invention.

It Will he noted, upon referring to Figs. 1 and 2 that the greater portion of the pulleys and the rigging of the apparatus is in the attic D of the house or dWelling.

Further, the operation of the signaling device is just the same With respect to the inflammable or fusible cord 18 leading to the furnace C; suitable pulley arrange- I ments can be placed around the furnace just as the pulleys shown in Figs.V -1 and 2 are placed around the chimney, and the severance of the cord or cable 18 Will have the same efi'ect upon the signaling device as the severance of the cords or cables18 leading to the chimneys. i

In Fig. 5 I have shown an enlarged view of one of the bars or triggers, showing a Wood eyelet 13a through Which the cable 18 extends; all of the bars or triggers 18 have this Wood eyelet 13a. These Wood eyelets 13a do not cut the cords or cables 18, thereby making the connections more lasting.

It is to be understood that I reserve the right to make such alterations and changes in the construction of my apparatus as shall fairly fall Within the scope of the appended claims.

7What I claim is:

1. In an apparatus of the class described, the combination With a plate, a spring actuated clapper and bell device carried by said plate, of a spring held paWl coperating With said clapper and bell device for normally preventing the same sounding an alarm,`said paWl provided With a comparatively long rcar end, a stationary bracket secured to said plate, a plurality of trigpivotally mounted upon said bracket, Springs upon said bracket and engaging said triggers and AXerting a doWnWard pressure' thereon, each trigger engaging the rear end of said paWl, and inflammable 01' fusible means connected to the trigger near its outer end and normally holding the triggel' so that the spring coperating there- With Will not force the same doWnWardly against the rear end of the paWl sutficiently to disengage the paWl from the spring and bell device.

2. In an apparatus of the class described, the combination of a plate, a signaling device provided With a pawl carried by said plate, a stationary bracket secured to said plate, a trigger pivotally mounted upon said bracket and engaging said pawl, means on said bracket and engaging said trigger for forcing the same doWnWardly When said trigger is released, said triggerprovided near its outer end With a transversely-positioned horizontal Wood eyelet, and means connected to the trigger in the Wood eyelet for normally preventing vthe trigger from sWinging doWnWardly upon the bracket and releasing the paWl.

3. In an apparatus of the class described,` the comblnatlon of a plate, a slgnahng de-` vice provided With a paWl carried by said plate, a stationary bracket positioned at right angles to the plate and having its ends secured thereto, a plurality of triggers piv-' otally mounted at` their inner ends upon said bracket between its ends, the outer ends of all of said triggers resting upon the top of said paWl, coil Springs on said bracket between said triggers, each coil spring having its outer end pressing down upon a trigger betWeen its ends and having its inner end engaging the plate, each trigger near its outer end provided With a transverselypositioned horizontal Wood eyelet extendin`g therethrough, and means threaded through the Wood eyelets of the triggers for normally preventing the triggers from swinging doWnWard upon the bracket and releasing the paWl.

In testimony Whereof I hereunto afiix my signature.

JOHN VVILSON. 

